The core issue seems to be that the incoming USB source is seen by Windows as a microphone USB source and - using the helpful notes in the previous reply - I have been able to ascertain that despite me installing the ASIO4ALL driver that I downloaded from the Behringer support site I still only have a USB Mic input - I'm seeing no "Line input" from USB.
![behringer usb audio driver for windows 10 behringer usb audio driver for windows 10](https://d1aeri3ty3izns.cloudfront.net/media/8/84197/1200/preview.jpg)
I have been over and over the Audacity settings and tried all the sources. I should add that the stereo sound on all mixer outputs (main, monitor, record etc) is full stereo with both channels present so I am 100% convinced that the issue is on the Windows side. That single channel gets copied onto both tracks of the stereo recording when using Direct Sound - but only as single channel mono when using WSPI - in that mode it only offer one channel in the options. Tried different cables and different ports on the laptop, but each time when trying to record the stereo signal (using Audacity) from my mixer I only get one channel (which I think is the right hand channel). My DX2000USB USB output is connected to my Acer (fully updated Windows 10) laptop USB port. I have logged a support ticket with Behringer's support agents but I'm casting the net as wide as possible cos I need a quick answer/solution. I have a Behringer DX2000USB mixer and I seem to be suffering some kind of USB connectivity problem, perhaps related to those outlined in this topic. There was some terrible YT videos showing people how to manually install those old drivers and I just remember shaking my head when I saw that. For Windows 10, the users I assist don't have administrator access and, in reality, have little dinosaur arms that don't reach very far. TBH, I mostly deal with Macs, which is a good thing when it comes to audio. If you uninstall it, it apparently leaves inf messed-up so Windows will not then install any simple USB audio device. Have you come across any users who found the ancient Behringer USB driver V2.8.40 on the web and installed it? I think it dates from Win XP and it can play havoc with Windows 10.
![behringer usb audio driver for windows 10 behringer usb audio driver for windows 10](https://centurionusacorp.com/wp-content/uploads/2019/06/placa-de-audio-behringer-umc22-p-gravaco-2x2-home-estudio-D_NQ_NP_623118-MLB27932557371_082018-F-800x800.jpg)
I usually fix it by forcing all enhancements off. Windows is rather inclined to treat USB audio devices as mono anyway. Dell specifically only has a mono input so the symptom is you can't get a stereo signal in if you're using their driver. Go into Device Manager and make sure the USB device is using the Microsoft driver and not the vendor specific one.